35results about How to "Increased reactive sites" patented technology

The invention relates to a preparation method of a composite material, and concretely relates to a preparation method of an MoS2 / ZnIn2S4 nanosheet composite material by using sheet MoS2. The low photocatalytic activity of a single ZnIn2S4 photocatalyst at present is a problem that remains to be solved in the invention. The method comprises the following steps: 1, mixing sheet MoS2 with anhydrous ethanol; 2, adding to a mixed solution comprising an indium salt, a sulfur source, a zinc salt, a polyol and anhydrous ethanol; and 3, reacting, washing, and drying. The method realizes the controllable preparation of the MoS2 / ZnIn2S4 nanosheet composite material; and the prepared MoS2 / ZnIn2S4 nanosheet composite material has a very good stability. The method is used for preparing the MoS2 / ZnIn2S4 nanosheet composite material.

The invention discloses a catalyst for decomposing nitrous oxide and a preparation method of the catalyst. The catalyst is prepared by the deposition precipitation method. The method comprises the processes of preparing a deposit, washing, forming a deposit, activating through the catalyst, etc.; the catalyst comprises active ingredients, a carrier which is zirconium oxide, and additives, wherein the active ingredients include one or more than two of Co, Ni, Fe and Mn; the additives include one or more of cerium oxide, lanthanum oxide and barium oxide. A catalyst activity experiment shows that nitrous oxide can be completely catalytically decomposed into nitrogen and oxygen at the temperature ranging from 450 to 700 DEG C; therefore, the activation temperature is low, and the T50 (reaction temperature under conversion rate of 50%) is about 350 DEG C. The catalyst is high in activity and outstanding in heat resistance, has a wide operation window, and enables the concentration of nitrous oxide in industrial waste gas to be greatly reduced, and therefore, the environmental pollution is decreased; the catalyst is particularly suitable for N2O removal of a nitric plant and an adipic acid plant.

The invention provides a solid oxide fuel cell. The anode layer, cathode layer and electrolyte layer of the cell contain cerium-based materials; the cerium-based materials of the anode layer and the cathode layer are cerium-based materials with a flower-shaped structure; and the anode layer and the cathode layer also carry catalysts and / or conductive additives. The invention also provides a preparation method of the cell. The solid oxide fuel cell has improved performance and service life and improves the acoustic performance of electrodes, thereby improving the overall reaction activity of the electrodes. The cell can use medium-low temperature solid oxide fuels of a plurality of fuels including hydrocarbons.

The invention discloses a tin selenide and tin oxide composite material and a preparation method and application thereof. The method comprises the following steps that a selenium-containing alkaline solution and a tin-containing acid solution are mixed according to the selenium-tin molar ratio of 1:1, heating is conducted to reach the temperature of 70-100 DEG C, stirring is conducted, reacting is conducted, precipitates obtained through reacting are washed, filtered, dried and calcined at 300-400 DEG C, and the tin selenide and tin oxide composite material is obtained. The tin selenide and tin oxide composite material serving as a sodium (lithium) ion battery cathode material has an excellent electrochemical property, the preparation method of the material is simple, the cost is low, and the material has a wide industrial application prospect.

The invention discloses a tin diselenide / polyethyleneimine composite material and a preparation method and application thereof. The preparation method comprises: dissolving selenium powder in a sodium borohydride solution with inert gas saturated to obtain a selenium-powder-containing solution, mixing the selenium-powder-containing solution with a tin sources aqueous solution according to a required ratio of selenium to tin for preparation of tin diselenide to obtain a mixed solution, adding polyethyleneimine into the mixed solution, performing full stirring, and carrying out a hydrothermal reaction; and filtering, washing and drying the obtained product to obtain the tin diselenide / polyethyleneimine composite material. In the obtained composite material, polyethyleneimine uniformly coats tin diselenide hexagonal nanosheets. The composite material can be taken as an anode material for a sodium-ion battery and has excellent electrochemical performance. The composite material is simple in preparation method and low in cost and has bright industrialized application prospects.

The invention belongs to the organic battery technology in the field of electrochemical energy storage, and relates to a method for modifying a graphite felt electrode by manganese dioxide which can achieve the large-scale production, in particular to a method for modifying the graphite felt electrode for an organic flow battery. The method comprises the following steps: firstly, processing graphite felt through supersonic-acid mixing, so that the surface area of graphite fibers is increased and the reaction sites of a graphite electrode are increased, and the surface of the graphite fiber isnot obviously broken; growing manganese dioxide on the surfaces of the graphite fibers, so that the electrochemical reaction catalytic activity of the graphite fibers is enhanced, and the battery capacity and the energy efficiency are improved. The method is simple and easy to operate, can realize large-scale production, is low in application cost, and provides an electrode material treatment approach with greatly improved performance for preparation of the organic flow battery.

The invention discloses a preparation method of a high-strength high-barrier TPU composite material, and belongs to the technical field of polymer composite material synthesis. According to the method, carrying out a reaction between polytetramethylene ether glycol and 4, 4 '-methylenediphenyl diisocyanate to obtain an isocyanate-terminated TPU prepolymer, adding modified graphene oxide into the TPU prepolymer, and taking the modified graphene oxide and 1, 4-butanediol as a compound chain extender to participate in an in-situ polymerization process, so as to complete a chain extension reaction, thereby obtaining the high-strength and high-barrier TPU composite material. The modified graphene oxide enables reaction sites of a reaction system to be increased; the crosslinking degree of the composite material is improved, and a large number of covalent bonds and hydrogen bonds exist in the prepared TPU composite material, so that the dispersity of the modified graphene oxide in a TPU matrix is good, the interface bonding force with the TPU matrix is enhanced, and the barrier property and the mechanical property of the TPU composite material are improved.

The invention relates to a bio-based nanometer material and a preparation method thereof. The preparation method of the bio-based nanometer material comprises the following steps that an organism rawmaterial, including green plants, shells of shellfish, organs of molluscs and / or cell walls of fungi, is dispersed in an aqueous solution prepared from a peroxydisulfate activating system and an advanced oxidation technology system for hydrolysis reaction after being crushed to obtain hydrolysate; the hydrolysate is subjected to post-treatment to obtain the bio-based nanometer material; the peroxydisulfate activating system is prepared from a peroxydisulfate-containing agent and a peroxydisulfate activating agent; the advanced oxidation technology system is prepared from hydrogen peroxide andan agent for making the hydrogen peroxide generate hydroxyl radicals. The preparation method of the bio-based nanometer material is high in preparation efficiency, high in reaction speed and low in preparation cost. The invention further provides the bio-based nanometer material prepared through the method.

The invention discloses a composite photocatalytic material with efficient photocatalytic activity and a preparation method thereof. The composite photocatalytic material comprises modified nitrogen carbide, a first catalytic material, a second catalytic material, carbon fibers, and sodium phosphate. The modified nitrogen carbide is prepared through a precursor self-assembly co-polymerization modification method; and melamine and trithiocyanuric acid are adopted as raw materials. The first catalytic material is an Ag / Ag3PO4 / BiPO4 composite material, the second catalytic material is of a CdS micro-sphere@TiO2 core-shell structure, the first catalytic material and the second catalytic material have excellent photocatalytic activity and visible light utilization rate, and then the first catalytic material, the second catalytic material and modified nitrogen carbide are compounded; the photocatalytic material is prepared by compounding the first catalytic material, the second catalytic material and the modified nitrogen carbide, so that the visible light utilization rate of the photocatalytic material is effectively improved, and the photocatalytic material is excellent in reaction activity and photocatalytic reaction efficiency and has relatively high practicability.

The invention relates to the technical field of sulfur dioxide pollution emission control and combustion-supporting energy conservation in fire coal, in particular to honeycomb briquette containing asulfur-fixing combustion-supporting additive and a preparation method thereof. The honeycomb briquette is prepared from the following raw materials in percentage by mass: 72% of a coal slime and raw coal mixture, 15% of clay, 10.9-11.7% of carbide slag, 0.2% of Na2CO3, 1.1% of KMnO4 with the purity of 40% and 0-0.8% o of a pore forming agent, wherein the pore forming agent is an organic sodium salt; according to the invention, residual carbide slag after coal mining is used as a main alkali source, industrial-grade potassium permanganate and the Na2CO3 are added to serve as combustion improvers besides coal slime left after coal washing serves as main auxiliary binders, and on the basis that the use cost and the use amount of raw materials are reduced, the pore-forming agent is added in the honeycomb briquette preparation process to achieve the purpose of improving the sulfur fixation effect; due to the addition of the additives, in the combustion process of the honeycomb briquette, organic groups can be decomposed into non-toxic and harmless carbon dioxide and water to be discharged into air, so that the honeycomb briquette has a porous structure.

The invention relates to a porous silicon / carbon composite negative electrode material in-situ synthesized by taking porous polymer microspheres as a template, a preparation method and a lithium ion battery. The preparation process comprises the following steps of: adding porous polymer microspheres into water, heating and stirring to obtain a suspension solution; adding a silicon source into the suspension solution to obtain a mixed solution; filtering the mixed solution, washing the mixed solution with deionized water and drying the mixed solution in sequence, then adding a reducing agent, and conducting grinding and mixing to obtain an intermediate product A; treating the intermediate product A through a thermal reduction process to obtain an intermediate product B; and carrying out acid pickling on the intermediate product B, washing with deionized water, filtering, and drying to obtain a final product. Compared with the prior art, a carbon layer obtained through in-situ compounding can better improve the electrical conductivity, the cycling stability, the charge-discharge efficiency, the rate capability and other electrochemical properties of a silicon negative electrode, and the unique micro-nano pores reserve a lithium-intercalation expansion space for silicon and reduces the absolute volume change of the composite material in the charge-discharge process.

The invention discloses a preparation method of a porous honeycomb ceramic catalyst with a high specific surface area. The porous honeycomb ceramic catalyst is prepared by taking titanium dioxide, montmorillonite and alpha aluminum oxide as carriers and ammonium metatungstate, ammonium metavanadate, cerium nitrate and palladium acetate as active components through mixing, aging, kneading, molding, drying and roasting under the accompanying of auxiliary materials, wherein the auxiliary materials comprise monoethanolamine, ammonia water, lactic acid, stearic acid, glass fibers, macromolecular polymer fibers, hydroxypropyl methyl cellulose, polyoxyethylene, citric acid and water. According to the preparation method of the porous honeycomb ceramic catalyst with the high specific surface area, the catalyst carriers are optimized in order to be adapted to application conditions of frequent temperature variation, high concentration of nitrogen oxides, high heat stability and high specific surface; the montmorillonite and the alpha aluminum oxide are used for replacing one part of the titanium dioxide, the montmorillonite has the enhancing effect and the aluminum oxide has the effect of high heat stability; and meanwhile, the macromolecular polymer fibers are used for replacing wood pulp so that a grinding tool is difficult to block in a production process and the production efficiency is improved.

The invention discloses a solid oxide electrolytic cell oxygen electrode and a preparation method thereof.The oxygen electrode is composed of an oxygen ion-electron mixed conductor framework and a nano-composite catalyst evenly covering the surface of the oxygen ion-electron mixed conductor framework, the particle size of the oxygen ion-electron mixed conductor framework is 200-2000 nm, the porosity of the framework is 40-70%, the particle size of the nano-composite catalyst is 1-100 nm, and the particle size of the nano-composite catalyst is 1-100 nm. The electrode with the structure has abundant oxygen evolution active sites, and shows excellent electrochemical performance and good stability.

The invention discloses an efficient electrode for treating industrial circulating cooling water and a preparation method of the efficient electrode. The efficient electrode comprises a Ti matrix, a SnO2-Ce intermediate layer and a SnO2-Sb-Ru active layer which are distributed in sequence from top to bottom. The electrode has the advantages that the catalytic activity is high, the corrosion resistance stability is high, the bactericidal capacity is strong, the energy consumption is low, the preparation is relatively simple, and the cost is low.

The invention belongs to the technical field of material preparation and environmental catalysis, and specifically relates to a modified graphite phase carbon nitride and its preparation method and application. The modified graphite phase carbon nitride is prepared by copolymerization of urea and tetrabromobisphenol A obtained, wherein the content of bromine in the modified graphite phase carbon nitride is 0.1-0.5 wt%, and the modified graphite phase carbon nitride has a nano-layered structure. The modified graphitic carbon nitride provided by the present invention is applied in the desulfurization reaction. 2 In the S-selective reaction, the material showed good catalytic activity and selectivity, and also had certain activity for COS catalytic hydrolysis.

The invention discloses a metal oxide / polypyrrole hollow nanotube negative electrode composite material for a sodium ion battery and a preparation method for the composite material. The composite material is formed by enabling metal oxide nanoparticles to be uniformly grown on the inner walls and outer walls of the polypyrrole hollow nanotubes; the preparation method comprises the steps of slowly adding pyrrole monomers into a water solution containing methyl orange and an oxidizing agent in a dropwise manner under a water bath condition; carrying out an in situ polymerization reaction while stirring to obtain the polypyrrole hollow nanotubes; and enabling the polypyrrole hollow nanotubes to be dispersed into water, then adding a metal salt solution and uniformly mixing, next, moving the mixture into a high-pressure reaction kettle to be subjected to a hydrothermal reaction to obtain the composite material. When the prepared composite material is used as the negative electrode of the sodium ion battery, the prepared sodium ion battery has high charging-discharging specific capacity, high rate capability, high stable cycle performance and the like; and in addition, the composite material is simple in preparation method, low in cost and wide in industrial application prospect.

The invention relates to a direct carbon fuel cell anode with dual electric catalytic functions, and belongs to the technical field of clean energy. The anode material is prepared by compounding nanoparticle as a conductive phase on the inner and outer parts of transition element-codoped CeO2 as a catalytic active phase of the anode and a porous framework. The prepared anode material has dual electrocatalysis effects on carbon fuel, can be used as an excellent ion conductor, transfers O<2-> generated by a cathode to the electrode surface and increases the electrode reaction active sites; the anode material can be applied to electrochemical oxidation of an intermediate catalytic carbon; and the power output of the cell is improved. The anode material disclosed by the invention is assembled into a direct carbon fuel cell for power generation, so that the three-phase interface length is prolonged; the fuel gasification reaction rate is improved; corrosion of molten carbonate to an electrolyte is avoided; and the lifetime of the cell is prolonged.

The invention belongs to the technical field of adhesives, and in particular relates to a two-component adhesive and its application in artificial boards. The two-component adhesive provided by the present invention includes independently packaged component 1 and component 2, wherein the component 1 includes formaldehyde-based resin; the component 2 is degraded tannin modified by a crosslinking agent, so The degraded tannin is prepared by degrading the tannin through a degrading agent; the degraded tannin modified by the crosslinking agent is obtained by modifying the degraded tannin by the crosslinking agent; the mass ratio of the tannin and the crosslinking agent is (100 ~80):(15~40); the mass ratio of the component 1 and component 2 is 1:(0.01~0.5). The degraded tannin reduces the steric hindrance of the tannin and increases the reactive sites of the tannin; during the curing process, the degraded tannin modified by the cross-linking agent polymerizes with the formaldehyde-based resin, which improves the performance of the two-component adhesive. Excellent cohesiveness, reducing the decomposition of formaldehyde-based resins makes the two-component adhesive have lower formaldehyde emission.

The invention discloses a high-efficiency electrode for treating industrial circulating cooling water and a preparation method thereof, which comprises Ti substrates, SnO 2 ‑Ce interlayer and SnO 2 ‑Sb‑Ru active layer, the electrode has the characteristics of high catalytic activity, high corrosion resistance stability, strong bactericidal ability and low energy consumption, and the preparation is relatively simple and the cost is low.

The invention discloses a preparation method of dithiocarboxylated straw, a product and application of the dithiocarboxylated straw as a heavy metal adsorbent. The method comprises the following stepsof: carrying out impurity removal, cleaning, drying, crushing, sieving and other pretreatment on straws, adding a certain amount of NaOH and distilled water, mixing and stirring for a certain time, adding CS2, continuing to stir and react for a period of time, heating, and continuing to react, and standing the mixed solution, carrying out suction filtration, washing the filter residue with distilled water until the pH value of the filtrate is constant, and drying the filter residue to constant weight, thereby obtaining the dithiocarboxylated straw. Through chemical modification, a functionalgroup dithiocarboxyl is grafted into a straw molecular structure, so that the adsorption performance of the straw is greatly improved, and the removal rate of the straw to heavy metals is remarkably improved.

The invention discloses a tin selenide and tin oxide composite material and a preparation method and application thereof. The method comprises the following steps that a selenium-containing alkaline solution and a tin-containing acid solution are mixed according to the selenium-tin molar ratio of 1:1, heating is conducted to reach the temperature of 70-100 DEG C, stirring is conducted, reacting is conducted, precipitates obtained through reacting are washed, filtered, dried and calcined at 300-400 DEG C, and the tin selenide and tin oxide composite material is obtained. The tin selenide and tin oxide composite material serving as a sodium (lithium) ion battery cathode material has an excellent electrochemical property, the preparation method of the material is simple, the cost is low, and the material has a wide industrial application prospect.

The invention belongs to the technical field of adhesives, and particularly relates to a double-component adhesive and application in artificial boards. The double-component adhesive provided by the invention comprises a component 1 and a component 2 which are independently packaged, wherein the component 1 comprises formaldehyde-based resin, the component 2 is degraded tannin modified by a cross-linking agent, the degraded tannin is prepared by degrading tannin through a degrading agent, the cross-linking agent modified degraded tannin is obtained by modifying and degrading tannin with a cross-linking agent, a mass ratio of the tannin to the cross-linking agent is (100-80):(15-40), and a mass ratio of the component 1 to the component 2 is 1:(0.01-0.5). According to the invention, the steric hindrance of tannin is reduced by degrading tannin, and the reaction active sites of tannin are increased; and in the curing process, the degraded tannin modified by the cross-linking agent is polymerized with the formaldehyde-based resin, so that the cohesiveness of the two-component adhesive is improved, the decomposition of the formaldehyde-based resin is reduced, and the two-component adhesive has relatively low formaldehyde release amount.

The invention provides a g‑C that rapidly degrades pollutants 3 N 4 Composite photocatalyst and preparation method thereof. The g‑C 3 N 4 Composite photocatalyst, using raw material g‑C 3 N 4 Prepared with hydrogen peroxide solution. g-C of the present invention 3 N 4 The composite photocatalyst has strong visible light absorption ability and good photocatalytic performance, and can quickly degrade pollutants in water.

The invention relates to a method for synthesizing three-dimensional porous silicon powder from silane and application of the three-dimensional porous silicon powder, and the preparation process comprises the following steps: adding macroporous polymer microspheres into a reactor, and introducing inert gas into the reactor to realize atmosphere replacement; silane and inert gas are introduced into the reactor at the same time, the reactor is heated to 400-900 DEG C, a constant-temperature reaction is conducted for 3-24 h, and introduction of the silane and the inert gas is stopped after the reaction is received; and after the reaction is finished, immediately introducing carbon dioxide into the reactor, heating the reactor to 900-1500 DEG C, carrying out constant-temperature reaction for 1-10 hours, then stopping heating, and cooling to room temperature along with the reactor to obtain the three-dimensional porous silicon powder. Compared with the prior art, the method has the advantages that the porous silicon powder with different pore / pore structures can be prepared according to requirements by selecting the macroporous polymer, the porous silicon powder is of a three-dimensional through pore / pore structure and is high in material structure stability, and carbon dioxide is used as a template remover; the product is carbon monoxide which can be recycled as fuel and is environment-friendly and clean.

The invention discloses an iron diselenide / sulfur-doped graphene anode composite material for a sodium-ion battery and a preparation method of the iron diselenide / sulfur-doped graphene anode composite material. The preparation method comprises the following steps: dissolving a sulfur source, a selenium-containing inorganic matter, an iron-containing inorganic salt and citric acid or sodium citrate into a graphene oxide solution; dropwise adding hydrazine hydrate to form a light black solution, adding the light black solution to a hydrothermal reaction kettle for reaction, and naturally cooling the product after the reaction is ended; and carrying out repeated washing, suction filtration and drying on a reaction sediment with distilled water and absolute ethyl alcohol, so as to obtain the iron diselenide / sulfur-doped graphene composite material. According to the iron diselenide / sulfur-doped graphene composite material prepared by the method, iron diselenide nano-particles are evenly distributed on the surface of the sulfur-doped graphene and the iron diselenide / sulfur-doped graphene composite material has excellent electrochemical properties as a sodium-ion battery anode material. The iron diselenide / sulfur-doped graphene anode composite material is prepared by a simple hydrothermal process; synchronous sulfur doping, graphene oxide reduction and graphene oxide and iron diselenide recombination can be achieved; and the iron diselenide / sulfur-doped graphene anode composite material is simple in preparation technology and low in cost, and has a wide industrial application prospect.